Steam News announces an automatic update is now live for Left 4 Dead 2, brining the long-awaited free Cold Stream DLC to the Windows and OS X editions of the co-op zombie shooter. VG247 points out that this tweet has word on what Xbox 360 owners should expect: "we are working with MS on a release schedule. We don't have an ETA yet but we hope to have it out soon. It will be 560pts."